Home / 129,970.45-179,284.38-78,251.59

Finding the Fourth Proportional to 129,970.45, 179,284.38 and 78,251.59

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Solution

The fourth proportional to 129,970.45, 179,284.38 and 78,251.59 is: 107,942.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,970.45 : 179,284.38 = 78,251.59 : x
  2. Step 2: Convert to fraction form
    129,970.45/179,284.38 = 78,251.59/x
  3. Step 3: Cross multiply
    129,970.45x = 179,284.38 × 78,251.59
  4. Step 4: Simplify right side
    129,970.45x = 14,029,287,797.16
  5. Step 5: Solve for x
    x = 14,029,287,797.16/129,970.45
  6. Step 6: Final answer
    x = 107,942.13

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.